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  3. [SOLVED]  Add record only if it doesn't exist in another table
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[SOLVED]

 Add record only if it doesn't exist in another table

 		10/28/2011 15:14:41
PHPRunner General questions
T
 teri.pratt@verizon.net author

I have a table named main_addresses containing a list of address (st_number, st_name, etc.). I want to add a new record to another_table only if the address being added doesn't exist in the main_table. Both tables contain the same fields. How do I do that? Before Record is added?
C
 		cgphp 10/28/2011

Yes, in the "Before record added" event of the another_table table:

global $conn;

$strSQLExists = "SELECT * FROM main_table WHERE field_1='".$values['field_1']."' AND field_2='".$values['field_2']."' AND field_3='".$values['field_3']."'";

$rsExists = db_query($strSQLExists,$conn);

$data=db_fetch_array($rsExists);
if($data)

{

//if record exists set the alert message and return false

$message = "This address already exists";

return false;

}
T
 		teri.pratt@verizon.net author 10/28/2011

Thanks, Cristian! Worked like a charm!